body{
    height: 100vh;
}

/*底部的工具栏*/
nav{
    /*固定在底部*/
    position: fixed;
    bottom: 0;
    width: 100vw;
    z-index: 9999;
    background-color: #ffffff;
    
}
ul.toolbar{
    height: 8.5vh;
    border-top: 1px solid lightgray;
    /*弹性布局*/
    display: flex;
    justify-content: space-around;
    align-items: center;
}
.toolbar li{
    width: 25vw;
}
.toolbar li span{
    display: block;
    text-align: center;
    color: #999999;
}
/*图标*/
.toolbar li .glyphicon{
    font-size: 1.1rem;
}
.toolbar li .text{
    font-size: 0.6rem;
}
/*被选中时的样式*/
.toolbar .toolbar-active span{
    color: #F56A00;
}

/*iframe*/
iframe{
    height: calc(100vh - 8.5vh);
    width: 100vw;
    background-color: pink;
    border: none;
}